Suppose that the true proportion of households with at least one car is T = .80. If a random sample of size n = 154 is drawn, what is the probability that the sample proportion will be less than .76 or greater than .82?

Suppose that the speed at which cars go on the freeway is normally distributed with mean 79 mph and standard deviation 9 miles per hour. Let X be the speed for a randomly selected car. Round all answers to 4 decimal places where possible.b. If one car is randomly chosen, find the probability that it is traveling more than 75 mph.  c. If one of the cars is randomly chosen, find the probability that it is traveling between 78 and 81 mph.    d. 60% of all cars travel at least how fast on the freeway?  mph.

The proportion of items in a population that possess a specific attribute is known to be 0.30. a. If a simple random sample of size n = 100 is selected and the proportion of items in the sample that contain the attribute of interest is 0.35, what is the sampling error? b. Referring to part a, what is the probability that a sample of size 100 would have a sample proportion of 0.35 or less if the population proportion is 0.30? a. The sampling error is. (Type an integer or a decimal.)

a..089 b..086 c..088 d..087

A poll is given, showing 51% are in favor of a new building project. Let X be the number of people who favor the new building project when 28 people are chosen at random. a. What is the distribution of X? X - ? ✓ Please show the following answers to 4 decimal places. b. What is the probability that exactly 11 people out of 28 favor the new building project? c. What is the probability that at least 11 people out of 28 favor the new building project? d. What is the probability that more than 11 people out of 28 favor the new building project? e. What is the probability that between 7 and 16 (including 7 and 16) people out 28 favor the new building project?

A courier service company wishes to estimate the proportion of people in various states that will use its services. Suppose the true proportion is 0.050.05. If 216216 are sampled, what is the probability that the sample proportion will differ from the population proportion by less than 0.040.04? Round your answer to four decimal places.

Suppose that the speed at which cars go on the freeway is normally distributed with mean 69 mph and standard deviation 7 miles per hour. Let X be the speed for a randomly selected car. Round all answers to 4 decimal places where possible.a. If one car is randomly chosen, find the probability that it is traveling more than 66 mph. b. If one of the cars is randomly chosen, find the probability that it is traveling between 72 and 76 mph. c. 84% of all cars travel at least how fast on the freeway?  mph.

Suppose that the speed at which cars go on the freeway is normally distributed with mean 78 mph and standard deviation 9 miles per hour. Let X be the speed for a randomly selected car. a. What is the distribution of X? X N( b. If one car is randomly chosen, find the probability that it is traveling more than 75 mph. Round to 4 decumal places. c. If one of the cars is randomly chosen, find the probability that it is traveling between 81 and 87 mph. Round to 4 decimal places.

Suppose samples of size 100 are drawn randomly from a population that has a mean of 20 and a standard deviation of 5. What is the probability of observing a sample mean equal to or greater than 20.5? 0.8384 0.4192 0.1634 0.9192 0.1587

Suppose that the speed at which cars go on the freeway is normally distributed with mean 79 mph and standard deviation 5 miles per hour. Let X be the speed for a randomly selected car. a. What is the distribution of X? X - N( 79 5 or or b. If one car is randomly chosen, find the probability that it is traveling more than 78 mph. Round to 4 decumal places. c. If one of the cars is randomly chosen, find the probability that it is traveling between 81 and 86 mph. Round to 4 decimal places.